Raveon RV-M7 GX WX User manual

M7 GX Technical Manual 1 Raveon Technologies Corp.
RV-M7 GX
G P S T r a n s p o n d e r
Quick-Start Guide
Version C0 February 2010
RV-M7 GX
RV-M7 GX WX
Raveon Technologies Corporation
990 Park Center Drive, uite C
Vista, CA 92081
www.ravtrack.com
www.raveontech.com

M7 GX Technical Manual 2 Raveon Technologies Corp.
1. Safety / Warning nformation
1.1. Blasting Caps and Blasting Areas
To avoid possible interference with blasting operations, turn off this radio or remove the DC power when
you are near electrical blasting caps, in a blasting area, or in areas posted: “Turn off two-way radio.”
Obey all signs and instructions.
1.2. Potentially Explosive Atmospheres
Turn off your radio prior to entering any area with a potentially explosive atmosphere. Do not install this
product for use in areas with potentially explosive atmospheres. Do not remove, install, or charge batteries
in such areas. parks in a potentially explosive atmosphere can cause an explosion or fire resulting in bodily
injury or even death.
Note: The areas with potentially explosive atmospheres referred to above include fueling areas such as
below decks on boats, fuel or chemical transfer or storage facilities, areas where the air contains chemicals
or particles, such as grain, dust or metal powders, and any other area where you would normally be advised
to turn off your vehicle engine. Areas with potentially explosive atmospheres are often but not always posted.
Use this manual in conjunction with the M7 GX Technical Manual, which contains
important safety, licensing, and FCC information.
2. Overview
Raveon’s RV-M7 GX series of GP transponders are a rugged high-speed UHF data modems with a built-in
12-channel GP receivers. The M7 GX has ½ to 5 watts of RF power output, and operates as both a GP
transponder for tracking, and a radio modem for sending and receiving data.
The M7 GX may be configured for a number of different GP applications, including:
Transponder: Periodically transmit position and status. TX only.
RavTrack C: Connect the M7 GX to a personal computer running RavTrack C (or other PC software) to view a
map showing location, status, log movement, set alerts, and make reports from the data.
Radar Display: Connect M7 GX to a marine plotter or radar display, and icons will appear on the display showing the
location of all other M7 GX radios in the system.
G S display: Connect M7 GX to a hand-held or mobile GP , and icons will appear on the display showing the
location of all other M7 GX radios in the system.
-LX receive only: This configuration is for the M7 LX model. Is a M7 GX without the internal GP . It cannot transmit
location, status, or trigger alerts, but it will receive and output the location and status of other M7 GXs
in the system.
For privacy and security, over-the air encryption is standard on every M7 GX radio. For network versatility,
the M7 GX incorporates a 16-bit identification code, allowing up to 65,000 objects to be identified in one
system. For wide-area coverage, all M7 GX transponders may be set to store-and-forward messages from
other M7 GX transponders.
3. Operation
The M7 GX operates in a number of different “GP Modes”, each mode specific to the application it is being
used in. The mode of operation is set with one simple command, the GPS x command. The different modes
change the operation of the M7 GX in a number of ways. The serial-port data rate is set, the types of NMEA
formatted messages it will send out or accept is set, as will as how the internal UHF radio is used. The table
below summarizes this.

M7 GX Technical Manual 3 Raveon Technologies Corp.
GPS
Mode
Common Usage Default
Serial Port
Baudrate
Out ut
Message
Descri tion
GPS 1 Transponder
Simple tracking,
AVL, security.
4800 RMC,
GLL
Transmit only in this mode. The receiver is off and GP is turned
off between transmissions. This is the lowest-power consuming
mode. No RX.
GPS 2 PC / Base tation
roprietary interface
for C applications
that monitor M7
Transponders.
38400 PRAVE Connect the M7 GX to a PC computer running RavTrack PC (or a
custom application), The PRAVE message is in NMEA format,
and provides location and status information for every
transponder it receives.
GPS 3 Marine Radar
Displaying the
location of M7
transponders on a
ship RADAR
screen.
38400 TLL Connect the M7 GX to a marine RADAR display or plotter with a
serial port, and waypoints will appear on the GP screen at the
location of all M7 GX transponders within radio range. The
display must support the NMEA 0183 TLL message.
GPS 4 GP Display
Lowrance and
Garmin G S
displays. Mobile
displays.
4800 WPL Connect the M7 GX to a mobile or hand-held GP with a serial
port, and waypoints will appear on the GP screen at the location
of all M7 GX transponders within radio range.
GPS 5 -LX No GP
module
Lowrance and Garmin
G S displays. Radar
displays. Mobile
displays.
38400 PRAVE Connect the M7 GX to a PC running RavTrack C, or change the
message to WPL and use with a GP display. No internal GP ,
so no positions/status transmissions.
4. Electrical nputs and Outputs
The front panel of the M7 GX modem has these features:
1. RF connector
2. Power LED
3. Status LED (Receive data = green, TX = red)
4. 9-Pin Serial I/O connector
5. DC Power Jack
4.1. LEDs
The status LED visually show the current status of the radio.
Status LED (TX) This LED blinks red when the transmitter keys and is putting out RF power. It blinks
green upon the reception of data or RF carrier.
Power LED (PWR) This LED does a short blink, once every two seconds, indicating to the user that the
power to the modem is ON and the modem is working. When the modem is in the command mode, this LED
will blink on and off, once per second.
When the GP is trying to acquire satellite lock, the tatus and Power LEDs will alternately blink back and
forth. This usually takes 10-20 seconds upon power-up or loss of satellite signal.
4.2. DC Power
DC power for the modem is connected to the 2-pin DC power input jack labeled DC IN. Use the supplied
cable to connect the DC power. The red wire is ositive (+) and the black wire is negative. Raveon
recommends at least 18 AWG wire be used.

M7 GX Technical Manual 4 Raveon Technologies Corp.
5. RS232 Serial /O Connector
The R 232 9-pin serial I/O connector is a female 9-pin D- subminiature connector having
the following pins configuration. It is pinned out so that it may be plugged directly into a
computer or PC’s 9-pin COM port.
Front-view of DB-9 connector on modem (female)
Pin Name Dir Function Level / Specification
1 CD out Carrier
detect
Indicates presence of carrier. Logical 0 means carrier is present. If disabled, it is
asserted (0). It will be a 1 when the modem is in the configuration mode.
2 RxD out Receive data Data out of the modem.
3 TxD in Transmit
data or IN2
Data into the modem.
Also used as digital input IN2 for exception reporting. GND or floating for a 0, >3V for
digital 1.
4 DTR in Data terminal
ready or IN0
Used as digital input IN0 for exception reporting. GND or floating for a 0, >3V for digital
1. Use the TRIGBIT command to set which bits are used as inputs.
5 GND Ground
connection
ignal and power ground
6 D R out Data et
Ready
Normally is set to 0 when modem is powered on and running. Modem sets to a 1 when
in low-power mode.
7 RT
in Request to
send
or
IN1
Used to stop/start the flow of data out TxD pin. 0 = OK, 1 = don’t send.
Also used as digital input IN1 for exception reporting. GND or floating for a 0, >3V for
digital 1.
8 CT out Clear to send Used to stop the flow of data going into the RxD pin from the device connected to the
M7. 0 = OK to send, 1 = don’t send
9 Power In or
out DC power User may supply the DC power to the modem on this pin. If the DC input connector is used to power the radio, then the DC power will also be on this pin.
Note: RS-232 signals use positive and negative voltages to represent digital 1s and 0s. A positive voltage is a 0, and a
negative voltage is a digital 1.
This pin-out allows it to be directly plugged into a computer’s 9-pin serial port using a conventional 9-pin R -
232 serial cable. To connect it to a modem, or peripheral that has a serial port, you will need a “null-modem”
cable.
N 2
(TXD)
N 1
(RTS)
N 0
(DTR)
Hexadecimal
Representation
0 0 0 0
0 0 1 1
0 1 0 2
0 1 1 3
1 0 0 4
1 0 1 5
1 1 0 6
1 1 1 7
6. Configuring the M7 GX
6.1. Overview
There is a “Command Mode” used to program and configure the M7 GX. In the Command Mode, the M7 GX
modem accepts commands via the serial port and the user may configure the internal parameters of the unit,
such as frequency and ID codes.
6.2. Command Mode
The M7 GX modem may be put into a “Command Mode”, by entering a sequence of three plus characters
(+++). Using serial communications software such as HypterTerminal, send the 3-character command
sequence “+++”.
When the M7 GX modem first enters the Command Mode, it sends its model number out its serial port, and
then an “OK”.

M7 GX Technical Manual 5 Raveon Technologies Corp.
6.3. Setting a Parameter
To set a parameter in the M7 GX modem, enter the Command Mode as described above, then enter the
proper command, a space, the parameter, and then a carriage return. For Example, to set the destination
address of the M7 GX modem to 25, enter the following command:
ATDT 25 <CR>.
6.4. CONF G Button
If certain parameters within the M7 GX transponder are modified in a manor that causes the modem to cease
functioning or if the user cannot enter the command mode via the “+++” method, there is a small push-button
inside the M7 to assist. This “CONFIG” button may be pressed at any time, and forces the M7 GX into a
known state. The CONFIG button is located inside the M7 GX. Remove the rear cover, exposing the circuit
board and he button as shown below.
The default settings that the M7 GX will revert to when the CONFIG button is pressed are:
1. Serial port 9600 baud, 8 data bits 1 stop, no parity
2. Serial port flow control is off.
3. ATCT setting set to 60000 (60 second time-out)
Even though the serial baud rate reverts to 9600 baud when the CONFIG button is pressed and the IO port
is R 232, it will revert back to the settings programmed into the M7 GX once the Command Mode is exited.
7. Commands to Configure Radio Operation
Command Command Descri tion Parameters Factory
Default
ATBD
Baud Rate – ets serial com port baud rate (bps). Over-the-air
(throughput) baud rate is set with ATR2 command.
If a PC’s serial baud rate is set higher than the fixed over-the-air
baud rate of the module, hardware handshaking may be required.
Range: 0 – 7
0 = 1200 5= 38400
1 = 2400 6=57600
2 = 4800 7=115200
3 = 9600
4 = 19200
3
ATDT
Destination Address to call– ets address of the modem to send
data to. Note, this parameter is entered in HEX format. Each digit
may be a 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,or an F.
Range: 0-FFFF 1234
ATF Display frequencies – Display all of the frequencies programmed into all of the
channel memories. N/A
ATFT
Transmit Frequency – Program the transmit frequency for this channel. Enter in
Hz or in MHz. he frequency will automatically be saved in non-volatile memory
(flash) for this current channel number.
Range: See product data
sheet. For MURS products,
frequency cannot be
changed.
See product data
sheet.
ATFR
Receive Frequency – Program the receive frequency for this channel. Enter in
Hz or MHz. he frequency will automatically be saved in non-volatile memory
(flash) for this current channel number.
Range: See product data
sheet. For MURS products,
frequency cannot be
changed.
See product data
sheet.
ATFX
TX and RX Frequency – Program the receive and transmit frequency for this
channel. Enter in Hz or MHz. Same as issuing an A FR and an A F command.
he frequency will automatically be saved in non-volatile memory (flash) for this
current channel number.
Range: See product data
sheet. N/A

M7 GX Technical Manual 6 Raveon Technologies Corp.
ATHP
Channel Number – elect separate channels to minimize
interference between multiple sets of modules operating in the
same vicinity.
Range: 1 - 6 1
ATMK Address Mask – Configures local and global address space. Each
digit may be a 0,1,2,3,4,5,6,7,8,9. Range: 0000 - FFFF FFFF
ATMY Unit Address – Configures the individual; address for this unit.
Each digit may be a 0,1,2,3,4,5,6,7,8,9. Range: 0000 - FFFF 1234
ATP
RF Power utput. et or show the RF power output setting. Value
is in percent, from 0% to 100%. Use and RF wattmeter to confirm
the power setting, and adjust the % accordingly to obtain the
desired RF power level.
0-100 100
ATR2
ver-The-Air bit rate - his is the data rate the radio uses to send data over the
air. All RF modems in the network must use the same over-the-air baud
rate. Refer to section Error! Reference source not found. for information on
how to set the O A baud rate.
Range:
0 = 800 7 = 5142 2L
5 = 9600 2L 3 = 4800
1 = 1200 8 = 9600 4L
6 = 19200 4L 4 = 8000 4L
2 = 2400 9 = 2000 2L
3
ATRV Disable Remote Access – When enabled (set to a 0), the modem will respond
to over-the-air RPR requests, Pings, and over-the-air commands.
0 = Remote Access on
1 = Remote Access disabled 1
ATSL
Serial Number – Reads and returns a unique serial number for
thjs unit.
Read Only
1 - 999999999
unique
ATSH
or
SH W
Show – Display the configuration of the modem. This will return a
page of A CII characters, showing the main configuration
parameters.
none None
ATST Statistics – how the unit’s operational statistics. ee tatistics
section of user manual. 0, 1,2, 3, 4, or 5 None
ATVB Read DC in ut Voltage– Returns the DC input voltage reading, in
mV (12500 = 12.5VDC input). None none
ATVR Firmware Version – Returns firmware version currently loaded on
the module. Read Only, 3 characters Current version
REPEAT n Enable/Disable Store and Forward Re eating – 0=disabled, 1 –
enabled (repeat everything) 0 or 1 0 (Off)
PING
Ping another modem. Format is PING xxxx, where xxxx is the ID
of the modem to ping. If remote access is enabled on xxxx, it will
respond.
XXXX -
SH W Show/dis lay an overview of the radio’s configuration. None -
** indicates values that are calibrated in the factory and are unit-specific. If the “Radio Type”
is changed, these ill need to be re-calibrated.

M7 GX Technical Manual 7 Raveon Technologies Corp.
7.1. GPS Additional Commands to Configure GPS and Tracking Features
The following commands are unique to the –GX version of the M7. When you execute any of these
commands, the new parameter is automatically stored in EEPROM.
Command Command Descri tion Parameters Default
GX Dis lay GPS settings. how an overview of the current GP features and
configurations in the M7 GX. - -
GPS GPS O eration Mode. Read/ et the GX version’s Operating mode. 0 - 6 1
GPS&F
Reset all GPS (-GX version) arameters. et the GX version’s Operating
mode to GP mode 4, and sets all GP parameters to factory defaults. It
does not erase frequency or other radio-related parameters.
- -
IDLERATE IDLE TX Interval. et the number of seconds between position transmissions
when the unit is idle (has not moved more than TRIGDX meters).
0-9999
seconds 10
KEYPHRASE
Privacy Security Key Code. et the privacy key for this device. It must be
the same key as used on all other Raveon products in your system. It
secures radio transmissions from unauthorized reception. et it to 0 to disable
security encryption of data.
2-16 A CII
characters. “RAVEON”
PREFIX
ID Prefix. et an ID prefix. The prefix is 1-8 characters that will be put in
front of the ID when reporting an ID as a waypoint name. A dash means no
prefix. Default is a capitol letter V.
1-8 A CII characters
et it to “0” for no
prefix.
V
SLOTTIME TDMA Slot duration. Configure the width of a TDMA slot. 50m increments.
50 - 1000 200
SLOTNUM TDMA Slot Number. Configure the slot number that this radio will use to send
its data in. 1-9999 The MYID of the unit
TRIGBITS
I/O Change Re orting. Which bits are used as transmission triggers. This is
a HEX number. Bit 0 is IN0, bit 1 is IN1…. 0-FF 0
TDMATIME
Set/read TDMA Frame time. The length of one TDMA time frame, in
seconds. M7’s may transmit once per frame, and only in their preset time-
slot.
1-3599 10
TRIGPOL
Polarity of the in ut bits. 0 = normal active high operation(causes unit to
transmit when it goes high), 1 = Inverted, active low. This is a HEX number.
Bit 0 is IN0, bit 1 is IN1….
0-FF 0
Active high
TRIGEX
Re ort on change. ets which input bits cause a report on change. If a
particular bit is a 1, then it will trigger a report when it changes. The input bit
must also be enable with the TRIGBIT . This is a HEX number. Bit 0 is IN0,
bit 1 is IN1…
0-FF 0
TRIGDX
Distance trigger. et a distance (in meters) threshold beyond-which the unit
will transmit its position and status. If set to 0, the unit always reports at the
TXRATE. If set to an distance greater than zero, then the unit reports at the
TXRATE intervals if it has moved this distance since the last report. If it has
not moved, it will still report its position, but at the rate set by IDLERATE. If
IDLERATE is set t 0, then the unit will not report its position when not moving.
0-999 0
TRIGSPEED
S eeding Re ort. et a speed (in kilometers/hour) threshold above-which
the unit will begin reporting its position and status. et to 0 to disable this
feature.
0-999 0
TXRATE
GPS Re ort Rate. et number of seconds between GP reports. This is
also the rate at which the internal GP will measure position, speed, etc.
Even if the unit is not moving, the GP periodically measures position and
speed to determine if it has triggered a speed or position transmission.
1 - 9999 10
7.2. Factory Default Settings
For the UHF M7 GX model RV-M7-UC-GX, the factory defaults GP settings are:
Radio channel 1 .................464.500 MHz Slot Number............................The same ID
G S Mode ............................4 (G S display) ID refix ..................................V
Over-the-air baud rate:..........4800 baud, 2-level I/O Change reporting ..............0, off
Serial port.............................. 4800 N/8/1 roximity Alert.........................0, off
Hardware flow control ...........Off Security KEY...........................RAVEON
RF ower Output ..................5 watts osition report interval ...........10 seconds
Channel number ...................1

M7 GX Technical Manual 8 Raveon Technologies Corp.
8. Setup and nitial Configuration
1. Connect a DC power source to the DC IN connection on the front of the modem.
2. Connect a good quality antenna, cut to the operating frequency, to the BNC connector on the front of
the modem.
3. Connect a computer terminal, or PC computer running HyperTerminal, to the 9-pin I/O connector. The
factory default serial ports settings are 4800 bps, 8 data bits, 1 stop, no parity.
4. Put the M7 GX into the command mode. (enter +++ per ection 0)
5. Program the GP mode. ee the table on age 4 to identify the mode to use, and set it with the GPS x
command. Type GX and press enter to see an overview of the current GP related features and
configuration. For in-vehicle transponders that do not connect to PCs or displays, it is usually GPS 1
mode. For M7’s connected to a PC running RavTrack PC software, it is set to GPS 2.
6. Program the modem’s operating frequency to your desired operating frequency. This is done with the
ATFX xxx.xxxxx command.
7. Program the ID in the unit. equentially number the M7 GX units in your system, starting with 1. Use
the ATMY command to set the ID.
8. Program the ID to which this unit will send its data to. Typically this is the ID of the “Base” unit.
9. Program the SLOTNUM. This is the TDMA slot number that this unit will transmit in. By default it is the
same as its ID. Im ortant! All radios in your system must use different SLOTNUM settings.
10. ATMK The network address mask. Default is F000. This means this unit will receive all
transmissions from any other unit with an ID beginning with 0 (0001 thru 0999).
11. KEYPHRASE Enter a security key code “keyphrase”. Use any word or phrase 1-16 characters
long. It is case-sensitive. DO NOT FORGET WHAT YOU ET IT TO! The KEYPHRA E is the only
parameter that cannot be read out of the M7 GX. It must be the same as the KEYPHRA E
programmed into all the other M7 GX transponders in your system. The factory default KEYPHRA E
is RAVEON, call capitols.
12. To see an overview of how the modem is configured, use the SHOW command. To see an overview
of how the GP features are configured, use the GX command.
13. Verify the SLOTTIME and TDMATIME are set appropriate for your system. Consult the user manual if
you are not sure. The defaults are 200m LOTTIME and 10 second TDMATIME, which will give you
50 slots (numbered 0-49) to track 49 transponders.
14. Once the unit is configured, type EXIT to exit the command mode.
Remember, that from the factory, all M7 GX GP transponders are configured to simply work. Plug in power
and they will lock onto the GP satellite signal and begin transmitting their positions and status in their
appropriate time slot.
8.1. Enabling Repeater Features
Refer to the technical manual for advanced repeater configuration instructions. To quickly enable repeating
of all data sent from/to units 1-999, use the REPEAT 1 command. This will enable the repeater function, and
configure it to repeat messages, position, and status transmissions.
8.2. Set the Transmission Report rate
Use the TXRATE xx command to set the report rate, in seconds, for the M7 GX transponder. For example,
if you wish the M7 to report every 5 minutes, set the report rate to 300 seconds (TXRATE 300).
If the M7 GX should report position and status when it is moving, set the TXRATE xx to the desired time
between position transmissions. Then, program the IDLERATE xx to the desired number of seconds
between reports when the unit is not moving (idle).
mportant!: et the minimum distance the unit must move for a transmission occur with the TRIGDX xx
command. If TRIGDX is set to zero, then the unit will always report at the interval set with the TXRATE xx
command. This is the factory default setting.
For example, to transmit every 2 minutes when idle, and every 10 seconds when moving more than 500
meters, use these commands:
IDLERATE 120 (
to set the idling update interval to 2 minutes.)

M7 GX Technical Manual 9 Raveon Technologies Corp.
TRIGDX 500 (tells it to report at the IDLERATE if it does not move this many meters)
TXRATE 10 ( configures it to report every 10 seconds whenever it is moves more than TRIGDX meters)
8.3. Device Addressing
Security Key
The security KEY programmed into every M7 GX transponder ensures that only M7 GX transponders with
the exact same security code can receive position and status information. The security key is case sensitive,
so “Raveon” and “RAVEON” are two different keys. The factory default is “RAVEON”.
Addressing Basics
Addressing is used to differentiate one M7 Transponder from another. Each must have a unique ID number
programmed into them, so that when a position report is received, the ID of the M7 GX that sent the
message is known. This is called the MYID.
Each M7 GX has an ID programmed into it, and is represented as a 4 digit number. M7 GX IDs may be any
number between 0001 and 9999. The unit’s own ID is programmed with the ATMY xxxx command, and the
ID of the destination modem it sends its messages to (the Destination Address) is configured with the ATDT
xxxx command.
The default Address Mask is F000, which means the M7 GX will receive a transmission from any other M7
as long as the fist digit matches, in this case, is a 0.
For example, to set the MYID of your M7 to 17, enter:
MYID 17 <enter>
To set your M7 to send its position and status data to M7 number 1, enter:
ATDT 1 <enter>
To receive all messages from units with IDs 1-999, and exclude 1000-9999, set the mask to:
ATMK F000 <enter>
8.4. Time Slots
For optimum efficiency in a M7 GX system, begin sequentially numbering the MYID of the M7 GX
transponders at ID 0001. The second M7 should be ID 0002, and so on.
The M7 GX transponders have internal clocks with 20 ticks-per-second. They can measure time and initiate
transmissions 20 times every second (every 50m ). The factory default allocation is each TDMA time slot is
200m long, and thus in 10 seconds, up to 49 M7 GX transponders may report position. These parameters
are programmable, and may be re-configured based upon the type of system they are used in. Program the
slot time with the SLOTTIME xxx command, where xxx is in milliseconds.
For over-the-air rates of 4800 baud, Raveon uggests using a SLOTTIME of 200m when using a repeater,
or 100m if there is no repeater in the system.
For over-the-air rates of 9600 baud, Raveon uggests using a SLOTTIME of 150m when using a repeater,
or 50m if there is no repeater in the system.
A TDMA “Frame” time is the time it takes all units in your system to transmit. This is configured with the
TDMATIME xx command. The factory default is 10 seconds, so every 10 seconds, each M7 GX is allocated
a time-slot that it may use to transmit position in. The TDMA frame must be set long enough for all units to
transmit. For example, if you have 199 M7s, and use 200m TDMA slots, then the TDMATIME should be set
to 40 seconds.
All TDMA frames are synchronized automatically in all M7 GX Transponders to the top of the minute. lot 0,
frame 0 is at the top of each minute. lot number 0 is used for future protocol options, and should not be
assigned to any unit.
9. nstallation
1. ecure the M7 modem using the mounting holes on the side flanges of the unit.
2. Connect a DC power source to the DC IN connection on the front of the modem. Use the supplied
cable, or 18AWG wire, and connect the RED wire to +, and the black wire to – (ground). The black
wire and the case of the M7 should be connected to earth ground.

M7 GX Technical Manual 10 Raveon Technologies Corp.
3. Connect a good quality antenna, tuned to the operating frequency, to the RF connector on the front
of the modem. Use a quality antenna, and place is at as high-above obstructions as possible.
4. A separation distance of at least 20 centimeters must be maintained between the transmitter's
radiating structures and the body of the user or nearby persons.
5. Connect a GP antenna to the MA connector of the M7 GX. Although a passive antenna may work
if the cable length is very short, it is recommended that an amplified antenna be used, rated for 3.3V
operation. The GP antenna must have un-obstructed visibility of the sky.
6. Connect the computer, terminal, controller, or other hardware device that will be using the M7
modem to its DB-9 serial I/O connector using a shielded cable. ecure it to the M7 with the two
mounting screws on the sides of the DB-9 connector.
7. If the antenna is mounted out doors, us a lighting arrestor in-line with the antenna, and properly
ground the antenna and the M7 chassis to an earth ground.
8. Connect Digital Inputs. The stock M7 GX has up to 3 digital inputs, using the input pins of the R -
232 serial port. An open circuit or ground is a 0, and if they are connected to a positive voltage
greater than 3V, they are a digital 1.
RS-232 Pin Function
4 - DTR Input 0
7 - RT Input 1
3 - TXD Input 2
5 - Ground GND
10. Operation
Once power is applied to the M7 GX, the internal GP will begin to try to lock onto the GP satellites.
The two LEDs on the front of the M7 will begin to alternately blink red back-and-forth every second.
After 10 to 60 seconds, depending upon the satellite strength, the red alternating blinking will stop. This
indicates the internal GP receiver is locked onto GP satellite signals, and has a position fix.
The M7 GX will only transmit if it has GP lock. If the GP antenna is broke or obscured, the unit will not
report position or status.
When it is locked to GP , it will transmit its position and status at the interval programmed into the TXRATE
parameter.
Refer to the M7 GX Technical Manual for details on all of the events that will trigger a transmission.
Installation

M7 GX Technical Manual 11 Raveon Technologies Corp.
RV-M7 GX GPS Modes of O eration
The GPX x command is used to configure the RV-M7 GX for various common configurations. The following table lists the parameters internal to the
RV-M7 GX that are configured and saved when the GP x command is executed. After the command is executed, individual parameters may be
modified to customize the operation of the unit.
arameter G S mode Output Message Format NMEA osition GGA, GSV, RMC osition/status report rate Data communication via RS232 also Capable of Speed triggered position reports Speed Trigger default Minimum Distance Trigger Digital Input Triggers Serial ort Baud Rate Can be a repeater
Command
used to modify
this parameter
GPS x OUTPUT x NMEAOUT x TXRATE xx DATAMUTE x TRIGSPEED xx TRIGDX xx TRIGBITS xx ATBD X Re eat X Default = 0(off)
Transponder
1
Nothing No (0) 10 TX only
(1)
Yes 0
(off) 0
(off) 0 (off) 4800 NO
RavTrack PC
2
$PRAVE
( x=1 )
Yes (1) 10 TX & RX
(0)
Yes 0
(off) 0
(off) 0 (off) 38400 Yes
Radar
3
$GPTLL
( x=2 )
Yes (1) 10 TX & RX
(0)
Yes 0
(off) 0
(off) 0 (off) 38400 Yes
GPS Display
4
$GPWPL
( x=3 )
No (0) 10 RX only
(1)
Yes 0
(off) 0
(off) 0 (off) 4800 Yes
-LX receive only, no
GPS in the unit.
5
$PRAVE
( x=1 )
No(0) 10 RX
(1)
No N/A
*
1
N/A N/A 38400 Yes
.

M7 GX Technical Manual 12 Raveon Technologies Corp.
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